(x-10)(x+5) x intercepts would be (10,0) and (-5,0)
3 hours are between the 2
A function is even if, for each x in the domain of f, f (- x) = f (x). The even functions have reflective symmetry through the y-axis.
We have then:
f (x) = - cos x
f (-x) = - cos (-x)
On the other hand:
cos (-x) = cos x
So:
- cos (-x) = - cos x
Therefore, it is fulfilled:
f (- x) = f (x)
Example:
cos (pi / 2) = 0
cos (-pi / 2) = 0
Answer: True
Interest is a fee paid for the use of money over time.
Answer:
No real roots
Step-by-step explanation:
Given
7x² + 5x + 1 = 0 ← in standard form
with a = 7, b = 5, c = 1
To determine the nature of the roots use the discriminant
Δ = b² - 4ac
• If b² - 4ac > 0 then roots are real and distinct
• If b² - 4ac = 0 then roots are real and equal
• If b² - 4ac < 0 then the roots are not real
Here
b² - 4ac = 5² - (4 × 7 × 1) = 25 - 28 = - 3
Thus the 2 roots are not real
